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Checklist for Superfamily Pterygotioidea Clarke & Ruedemann, 1912
and region Washington County (Maryland, USA)


Class
 		Merostomata
Woodward, 1866
Horseshoe crabs, Merostomates		1
2
1		Family
Genera
Species		 
Taxom
 

Order
 		Eurypterida ♰
Burmeister, 1843
Eurypterids, Sea scorpions		1
2
1		Family
Genera
Species		 
Taxom
 

Superfamily
 		Pterygotioidea ♰
Clarke & Ruedemann, 1912
1
2
1		Family
Genera
Species		 
Taxom
 


List of families for Washington County (Maryland)
1 Family width 1 Species
Pterygotidae Clarke & Rue..., 19121SpeciesTaxom


Genera for Washington County (Maryland)
2 Genera with 1 Species
Erettopterus Salter, 1859
0SpeciesTaxom
Pterygotus Agassiz, 19641SpeciesTaxom


Species list for Washington County (Maryland)
1 Species
Pterygotus marylandicus ♰ Kjellesvig-W..., 1964

Subnodes of Pterygotioidea with occurrences in Washington County (Maryland)
FamilyPterygotidae ♰
Clarke & Ruedemann, 1912
2
1		Genera
Species
Taxom